[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] RE: rdtsc strangeness on upstream kernel
On 07/19/2010 04:55 PM, Dan Magenheimer wrote: >> With vcpus=2, timer0 goes up to about 2000 irq/sec on CPU0 >> and timer1 on CPU1 is the same while rdtsc/sec is about 20000. >> > No, wait, correct that...timer0 and timer1 are 1000 irq/sec. > (I was using "watch -d" which defaults to updating every > two seconds, not every second.) > > >> Is it possible that the timer interrupt is using rdtsc >> five times each interrupt? >> > TEN times each interrupt. > Do you have any other debugging/tracing enabled? CONFIG_XEN_DEBUG_FS for example? 10 sounds a little high, but not necessarily completely unreasonable, especially if there's tracing/debugging on. J _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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